Lamp-shade.



J. J. RITTER.

LAMP SHADE.

APPLICATION FILED MAB. 1, 1911.

Patented May 30, 1911.

JWM/CO1.

joum u im. LHururl'py an etarras eran nntic- JOHANN JAKOB RITTER, 0FBASEL, SWITZERLAND.

LAMP-SHADE.

naaste'.

Specification of Letters Patent. Patented May SID, 1911.3.,

Application filed March 1, 1911. Serial No. 611,626.

To all whom 'it may concern:

Be it known that I, JOHANN JAKOB RIT- Tan, a citizen of the SwissRepublic, and resident of Basel, Switzerland, have invented new anduseful Improvements in Lampbhades, of which the following is a full,-

clear, and exact specification. p

This invention relates to lamp-shades, and has for its object to providea shade especially adapted for the rational and hygienic illumination ofworkrooms.

According to the invention the improved shade comprises an upperreflect-or, and a lower glass distributer provided with concentriccorruga-tions, the said corrugations on one side of the crest or apexbeing translucent (mat, frosted, diamond pressed, etc), and upon theother side transparent, so that that portion of the Alight rays whichenters the eye is diffused or scattered, while the portion thrown backfrom the reflector passes unhindered through the transparent portions ofsaid distributer. In this Inanner the light rays which would otherwisefall direct on to the eye, have their intense glare dulled by the lightdestroying portions of' the glass distributer while those rays which arethrown back by the refiector, and which by reason of their indirect pathare of less brilliance, can penetrate uninluenced through thetransparent glass portions, whereby an excellent light is obtained asrelgards strength and blinding.

'lo enable the invention to be fully understood I will describe it byreference to the accompanying drawing which shows one form ot' carryingout the invention in sectional elevation.

u is the upper reflector and Z) the lower glass distributer which is inthe form of a plate and is provided with concentric corrugations arounda central translucent portion (-1, the said corrugations, on one side oft-he crest or apex being, as at c, translucent (mat, frosted, etc), andon the other side that is to say, at (l, being quite transparent, sothat that portion of the light rays which enters the eye is diffused orscattered, while the portion of the said light rays thrown back from therefiector, passes unhindered through the transparent portions of theglass. The reflector, which 1s of metal or frosted glass, or of othersuitable material, is properly shaped and provided with corrugationsVsuch that the light rays reflected by it receive the proper path ordirectionto cause them to pass downward through the transparent portionsCZ of th corrugations of the glass distributer.

'Ihe glass distributer b is detachably suspended to the reflector a, forexample, by means of the screws e.

That I claim is:

l. A lamp-shade consisting of an upper reflector and a lower glassdistributer provided with concentric corrugations, the said corrugationsbeing translucent on one side. of the apex or crest, and on the otherside transparent so that that portion of the light rays which meets theeye is diffused or scattered, while the portion reflected from thereflector passes unhindered through the transparent portions of theglass distributer.

2. A lampsshade consisting of an upperv reflector and a lowerglassdistributer provided with concengric corrugations, the saidcorrugations being translucent on one side of the apex or crest, and onthe other .side trapsparent so that that portion of the light rays whichmeets the eye is diffused or scattered, while the portion reflected fromthe reflector passes unhindered through the transparent portions of theglass distributer, said refiector being provided with corrugations inorder to give the proper direction to the rays reflected by it, suchthat they pass through the transparent portions of the glassdistributer.

In witness whereof I have hereunto signed my name this 17th day ofFebruary 1911, in the presence of two subscribing w1tnesses.

JOHANN JAKOB RITTER. Witnesses:

GEO. GIFFORD, AMAND BRAUN.

